50 MHz Voltage-to-Frequency Converter

17th Pan-American Synchrotron Radiation Instrumentation Conference

Madden, T.^1 ; Baldwin, J.^1

Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439, United States^1

关键词: Experiment data;    High-frequency pulse;    Nuclear instruments;    Synchrotron beamlines;    Voltage signals;    Voltage-to-frequency converters;    X-ray energies;    X-ray flux;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/493/1/012008/pdf
DOI  :  10.1088/1742-6596/493/1/012008

来源: IOP

【 摘 要 】

The Voltage-to-Frequency Converter (V2F) is an instrument commonly used in synchrotron beam line experiments for converting a slowly varying voltage signal representing x-ray flux to a high frequency pulse train, with each pulse representing a packet of x-ray energy. The pulses are commonly integrated with a digital counter to calculate total x-ray energy incident on a sample during an exposure. As x-ray experiment data is taken faster and faster and exposure times shrink, V2F frequencies must necessarily increase to preserve precision in measuring total x-ray energy. The APS Detector Group have designed and built two custom 50MHz V2F instruments for APS beam line experiments. The instruments are designed according to the Nuclear Instrument Module (NIM) standard and respectively reside at APS Sector 12-BM, and in the APS Detector Pool [1].